<!DOCTYPE html>
<html>

<head>
  <!-- 引入 Bootstrap 4 CSS -->
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/css/bootstrap.min.css">
  <!-- 引入 jQuery -->
  <script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
  <!-- 引入 Bootstrap 4 JS -->
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/js/bootstrap.min.js"></script>
  <!-- 引入 Bootstrap FileInput CSS -->
  <link href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-fileinput/4.4.9/css/fileinput.min.css" rel="stylesheet">
  <!-- 引入 Bootstrap FileInput JS -->
  <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-fileinput/4.4.9/js/fileinput.min.js"></script>
  <style>
    /* 将页面内容居中显示 */
    body {
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      margin: 0;
    }

    .container {
      width: 60%;
    }
  </style>
</head>

<body>
<div class="container">
  <form id="uploadForm" action="#" method="post" enctype="multipart/form-data">
    <input id="file" name="file" type="file" class="file" data-msg-placeholder="选择文件">
    <button type="button" id="uploadButton" class="btn btn-primary mt-3">Upload</button>
  </form>
</div>

<script>
  var hexcase = 0;
  var chrsz = 8;

  function hex_sha1(s) {
    return binb2hex(core_sha1(AlignSHA1(s)));
  }

  function sha1_vm_test() {
    return hex_sha1("abc") == "a9993e364706816aba3e25717850c26c9cd0d89d";
  }

  function core_sha1(blockArray) {
    var x = blockArray;
    var w = Array(80);
    var a = 1732584193;
    var b = -271733879;
    var c = -1732584194;
    var d = 271733878;
    var e = -1009589776;

    for (var i = 0; i < x.length; i += 16) {
      var olda = a;
      var oldb = b;
      var oldc = c;
      var oldd = d;
      var olde = e;
      for (var j = 0; j < 80; j++) {
        if (j < 16)
          w[j] = x[i + j];
        else
          w[j] = rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
        var t = safe_add(safe_add(rol(a, 5), sha1_ft(j, b, c, d)), safe_add(safe_add(e, w[j]), sha1_kt(j)));
        e = d;
        d = c;
        c = rol(b, 30);
        b = a;
        a = t;
      }
      a = safe_add(a, olda);
      b = safe_add(b, oldb);
      c = safe_add(c, oldc);
      d = safe_add(d, oldd);
      e = safe_add(e, olde);
    }
    return new Array(a, b, c, d, e);
  }

  function sha1_ft(t, b, c, d) {
    if (t < 20)
      return (b & c) | ((~b) & d);
    if (t < 40)
      return b ^ c ^ d;
    if (t < 60)
      return (b & c) | (b & d) | (c & d);
    return b ^ c ^ d;
  }

  function sha1_kt(t) {
    return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 : (t < 60) ? -1894007588 : -899497514;
  }

  function safe_add(x, y) {
    var lsw = (x & 0xFFFF) + (y & 0xFFFF);
    var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
    return (msw << 16) | (lsw & 0xFFFF);
  }

  function rol(num, cnt) {
    return (num << cnt) | (num >>> (32 - cnt));
  }

  function AlignSHA1(str) {
    var nblk = ((str.length + 8) >> 6) + 1,
            blks = new Array(nblk * 16);
    for (var i = 0; i < nblk * 16; i++)
      blks[i] = 0;
    for (i = 0; i < str.length; i++)
      blks[i >> 2] |= str.charCodeAt(i) << (24 - (i & 3) * 8);
    blks[i >> 2] |= 0x80 << (24 - (i & 3) * 8);
    blks[nblk * 16 - 1] = str.length * 8;
    return blks;
  }

  function binb2hex(binarray) {
    var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
    var str = "";
    for (var i = 0; i < binarray.length * 4; i++) {
      str += hex_tab.charAt((binarray[i >> 2] >> ((3 - i % 4) * 8 + 4)) & 0xF) +
              hex_tab.charAt((binarray[i >> 2] >> ((3 - i % 4) * 8)) & 0xF);
    }
    return str;
  }

  // 为上传按钮绑定点击事件
  $(document).ready(function () {
    $('#uploadButton').on('click', function () {
      var formData = new FormData($('#uploadForm')[0]);
      $.ajax({
        url: $('#uploadForm').attr('action'),
        type: 'POST',
        data: formData,
        contentType: false,
        processData: false,
        success: function (response) {
          // 使用 window.confirm 创建确认框
          if (window.confirm('上传成功')) {
            window.location.href = "/static/view/home.html";
          }
        },
        error: function () {
          alert('上传失败');
        }
      });
    });
  });
</script>
</body>

</html>